Synthetic nitrite (Traditional method) | • Sodium nitrite• Potassium nitrite | • Direct use of nitrite | • Commercialized | Alahakoon et al., 2015Hu et al., 2015 |
Natural nitrite | • Vegetable powder• Vegetable juice | • Nitrate contained in vegetable is converted into nitrite by reducing bacteria | • Commercialized | Hur et al., 2015Sebranek et al., 2012 |
Plasma technology | • Plasma treated water• Direct plasma treatment• Plasma treated vegetable source | • Generation of nitrite by plasma discharge using nitrogen and oxygen in the atmospheric air | • Not commercialized | Jung et al., 2017aJung et al., 2017bYong et al., 2018 |